Read We Are Legion (We Are Bob) (Bobiverse Book 1) Online
Authors: Dennis E. Taylor
We Are Legion (We Are Bob) (Bobiverse Book 1) (14 page)
However, in the last several years, 3D printers have become increasingly common. The technology is still in its infancy, but companies have already performed demonstrations by, for instance, printing words on a substrate using individual atoms. This is seen by some as the beginning of the beginning for real, practical, self-assembling manufacturing systems. A printer can build more printers, robotic workers, miners, and ultimately more Von Neumann machines. A few companies are experimenting with print heads capable of delivering multiple materials, kind of like color inkjet printers. The technology should continue to improve, until they have something that can deliver any element, atom by atom.
… Eduard Guijpers, from the Convention panel
Designing a Von Neumann Probe
It was time to go. I leaned back in my chair, looked around at the clouds, the French countryside below me, and Lucy, curled up on her cushion, dreaming whatever dogs dream of.
I’d spent a fascinating seven months, examining and cataloguing the biologies of Romulus and Vulcan. All my observations, every report, every image, had been uploaded to the space station and forwarded to Bill and onward to Sol. Drones had quartered the system and identified every pocket of ore worth bothering with. I’d left an autofactory and drones, which would continue to refine raw resources, pending the arrival of colonists. Or aliens, or maybe another probe. With that thought in mind, I’d also supplied a squad of busters. The station AMI had a profile of Medeiros and orders to ram on sight.
I decided I didn’t want to build a batch of Bobs here. Any colonists would need the resources more than me, and anyway I wasn’t sure if I wanted to be bothered. Hadn’t really worked out all that well for Bob-1.
I took my time, examined all the local stars, and decided on 82 Eridani. It was a good prospect, and not too long of a trip.
I squirted off a final report, indicating my intentions, and took a final look at the system representation in the holotank. Then I put on
On the Road Again
, full blast, and fired up the SURGE drive. In the village below my airship, French peasants cursed at me.
Speed is the essence of war. Take advantage of the enemy’s unpreparedness; travel by unexpected routes and strike him where he has taken no precautions.
… Sun Tzu,
Art of War
We came into the solar system at 5% of C, decelerating at a steady 2.5 g. We had carefully calculated our trajectory and approach speed so that we appeared to be arriving from Epsilon Eridani. A projection forward would have us pass very close to the sun, still moving at about 0.1 C.
We had chosen our approach vector after much deliberation. We needed something that posed a threat to the Brazilians, but that would allow them to intercept us. A course that performed a slingshot around the sun would allow the incoming Heaven vessels to emerge on the far side with a huge advantage in velocity and an unpredictable vector. The Brazilian vessels would not be able to simply sit and wait for us to come around.
Well, that was the theory.
We hoped that we could draw all six Brazilian probes into the pursuit.
I sat in my ready room, nervously watching the telemetry. We had just passed the point where the Brazilians would have detected our fusion signatures, allowing for light-speed lag. In another six hours, it would be impossible for them to intercept us. If the Brazilians decided to stand and fight instead of pursuing, we would have to consider withdrawing. A straight-up toe-to-toe duke-em-up was not to our advantage.
An hour passed before we saw movement. I had briefly experimented with having my VR self actually sweat, but had given it up as a human experience I really didn’t need to relive. We let out whoops when four of the fusion signatures began to pull away from the asteroid line.
“Four isn’t six,” I said, “but we have a lot better chance against two in a face-off.”
“Assuming we can knock off the first four,” Homer added.
“Mmm. Nothing’s ever a sure thing, I guess.”
It would take ten days to reach perihelion in our race around the sun.
***
“It’s time.”
I looked up at Homer’s announcement. He looked back at me expectantly.
“Okay, let’s do it. Guppy, launch the busters.”
[Aye]
The floating display depicted the Heaven-2 launching busters, spaced a few seconds apart, directly aft. The rail gun had been designed into the version-2 Heaven ships so that items could be launched fore or aft, with an impetus of hundreds of g’s. Each launch left the ship in momentary free-fall while the SURGE drive powered the rail gun, but we hoped that, at this distance, the Medeiri wouldn’t be able to detect the momentary blip in deceleration.
The busters would fall far enough back to be behind the Brazilian ships when their trajectory brought them in behind us. With their reactors off, running on stored power, the busters would be undetectable unless the enemy deliberately did a focused SUDDAR sweep in that direction.
***
The Brazilian ships had just pulled in behind us, as their trajectory merged with ours. I examined the diagram floating in the middle of my VR. The interactions were complex. We were decelerating at 2.5 g while we tried to make a slingshot maneuver around the sun; the Brazilian ships were accelerating at 2 g while trying to get close enough to us to lock and launch missiles, without going so fast that they were forced into a higher orbit. Meanwhile, the busters floated silently behind the Brazilian ships in free fall but with a greater velocity and no deceleration, therefore gradually closing in. The busters had to get as close as possible before they turned on their reactors, and we wanted all the action to happen on the opposite side of the sun, invisible to the two Brazilians who were still shepherding asteroids.
Finally, the Brazilians acted. Each ship launched a missile. The missiles, as feared, were SURGE-equipped and shot toward us with monstrous acceleration.
[Contact in 45 seconds]
“Order the trailing busters to attack.”
[Aye]
A tooltip went up on the hologram indicating that the order had been sent. Within seconds, eight data points lit up as the busters’ fusion reactors came online. The Brazilians reacted immediately, launching a wave of missiles to aft.
“Well, here’s where things get real,” Homer said.
I sensed the millisecond blips as my rail gun launched busters aft to intercept the incoming missiles. Homer and I launched four each. As they had been programmed to do, the busters paired up, one behind another, with each pair homing in on one incoming missile.
As the second wave of Brazilian missiles separated from the ships on the display, I could see that they had launched eight at the pursuing busters. According to our estimates, they should still have a total of four in reserve.
The pursuing busters went into a complex corkscrew pattern, designed to make it as difficult as possible for the defensive missiles to lock on.
Meanwhile, the Brazilian ships had split, forcing the attacking busters to select a target.
I had a few seconds of relative inaction, so I aimed a highly focused SUDDAR ping at one of the Brazilian ships. The return carried a gratifying amount of detail. Among other things, I saw that the ship was indeed out of missiles. Empty missile bays indicated that it had room for four. I sent an aside to Homer: “Sixteen missiles total, as expected.”
I turned my attention back to the approaching ordnance. Three of the Brazilian missiles each collided with a buster, annihilating both. The fourth missile managed to avoid the lead buster. However, in doing so, it left itself open to a broadside from the trailing unit of the pair. There was an explosion, and the fourth missile ceased to exist.
The multiple explosions saturated the video view and created a chaotic soup for radar and SUDDAR. During that brief interval of relative blindness, Homer and I fired eight cannonballs at full power.
When the image cleared, I could see that we’d destroyed all four missiles and still had four busters left. At the other end of the field, the eight Brazilian missiles had destroyed all eight pursuing busters.
No doubt the Brazilians were congratulating themselves on their fine shooting. But the purpose of those busters had been to use up their missiles. Medeiros’ behavior in Epsilon Eridani had shown that he was willing to sacrifice himself if he saw he couldn’t win. We wanted this group to use up their ordnance defending themselves instead of launching a suicide attack.
They still had four missiles in reserve, and four busters bearing down on them. We waited, trying to project an “out of ammo” vibe. A stalemate here would be a win for the Brazilians.
And finally, they committed. The Brazilians fired their last four missiles at the oncoming busters.
“Checkmate!” Homer yelled. Intent on the approaching busters, the Brazilians had failed to detect the cannonballs. Totally inert, with no radio or fusion signature, the cannonballs were invisible unless the Brazilians picked that specific moment to do a SUDDAR sweep.
Six of the eight cannonballs found their targets, just as the last wave of missiles and busters destroyed each other. We followed up with more cannonballs until telemetry indicated no activity in the enemy craft.
After days of preparation and waiting, the actual conflict had come down to who had more ammo.
Homer and I did omnidirectional SUDDAR sweeps, looking for any tricks or traps that the Brazilians might have unloaded before they were destroyed. A second sweep checked the area around the wreckage of the enemy ships. Finally, satisfied that nothing awaited us, we eased over and checked for any still-operational or partly-destroyed busters.
Homer thought this was funny. “Going to give them a proper burial?”
“No,” I responded. “I’m going to try to build a couple more busters. I’ve got the parts, except I’m a little short on massive balls of solid steel.”
Homer chortled like a kid who had just made a potty joke. “Balls of solid steel…” He snorted.
I sighed, and the words
friendly fire
flashed through my mind. “Homer, we’ve got six busters left, and the two Brazilians have four missiles each if they’re provisioned the same as the four we just destroyed. Not only can we not do the pairing-up thing to defend against the missiles, but we don’t have enough busters to take out the missiles
and
the ships, even if our luck is perfect. So I’m going to try to rebuild some busters, and I’m going to scoop up a bunch of scrap from the battle as well, for rail gun ammo. You might want to do the same.”
Homer looked thoughtful for a moment, then nodded.
***
Phase two of the assault involved sneaking up on the two remaining Brazilian ships. We had deliberately chosen an approach around the sun that would require us to come around the other side at full 2.5 g acceleration in order to get to Earth. And we had been very careful not to display our full 5 g capability since coming in-system. Now we applied every erg of power to bending our course before we came around from behind the sun.
[Shutdown in five seconds]
I shut down my VR. In a few seconds, both ships would go dark. We would shut down the SURGE drives and go ballistic. We would stop using SUDDAR and shut down the fusion reactors. As far as the Brazilian ships would know, we and our pursuers had annihilated each other. When they didn’t see us come out the other side on the expected trajectory, hopefully they would relax their guard.
For two days, we would drift, surviving on power cells. We would lower our frame rates to minimum in order to save every milliwatt of power. The roamers would be set to refining the scraps from the battle into cannonballs for the rail gun, but as each roamer ran its power cell down, it would be shelved.
We would power up only when we had put Earth directly between us and the Brazilians.
[Shutdown]
I felt the ship go dark. I cranked my frame rate all the way down…
***
[We have arrived]
“Report.”
[Orbital insertion was successful. We are coming up on a point directly on the other side of Earth from the Enemy ships]
“Excellent. As soon as we’re sufficiently shielded, start everything up and accelerate to keep us in their blind spot.”
[Aye]
As power came up to full, I restarted my VR and relaxed into my captain’s chair.
Homer popped up in a video window. “I see you survived the trip.”
I nodded to him.” Let’s get the mission status up in the tank, Guppy.”
The holotank filled with a schematic showing the Earth, the location of our ships, and the location of the two Brazilian ships and the four asteroid masses that they were shepherding.
[Positions of enemy are extrapolations, but are high probability, based on orbital mechanics and most recent observations]
“That’s fine, Guppy. Our biggest problem will be if the Brazilians play hide and seek behind the asteroids that they’re herding. If they fire their missiles from hiding, they won’t have a lock-in and will have to depend on the missile’s AMI, which we’ve already established is not very smart. We can set our busters to seek-and-destroy, but they don’t have explosive warheads. Without a good head of steam, they won’t be able to penetrate the hull, let alone do any internal damage.”
“If we’re that close, we can use rail guns,” Homer said.
“True, but we have to be careful with our ammo.”
***
We came around the Earth, already doing over 150 km/s. The Brazilian ships might or might not have noticed us right away, but they had six hours to see us and prepare for our arrival. We were still only revealing a maximum 2.5 g acceleration. Let them expend energy wondering how we managed to get behind Earth.
When we were still five minutes away from the lead asteroid, we received a hail from one of the Brazilian ships. I put the call up on the holotank, while Homer observed.
The video was a still image of the Brazilian flag. No avatar, I guess. “You have shown better than we expected from a couple of FAITH
babacas.
However, now you are coming to us. You will not be so lucky this time. We will litter space with your corpses!”
I looked at Homer in surprise.
That’s not Major Medeiros. Who is that?
“This is Commander Riker of the FAITH Space Navy. To whom am I speaking?”
“I am Captain Matias Araújo. I will be the last voice you hear.”
Without further commentary, the sender disconnected.
Homer and I exchanged looks. After a pause, Homer said, “So, what do you think is going on?”
I thought about it for a moment. “I don’t know. But that deep scan I did just before we destroyed our pursuers showed all fabrication systems had been removed to make room for the larger SURGE-based missiles. I didn’t think that through at the time, but now it looks like this may have been a last-ditch effort on the part of the Brazilian Empire. Maybe they were getting stomped, and the probe project was all they had left. They ‘volunteered’ some guy—someone disposable—, stuck his replicant into the ships, and tried to use them as gunships.”
Homer cocked his head. “Which might mean they didn’t have time to give this guy a lot of training in being a replicant. And these ships may be all that’s left of the war.”